Driving mechanism



Patented Oct. 7, 1941 I "UNITED-,f .STATES PATENT IOFFICE 41 L, Y @cessato-jf 1fjjfvjjff@ DRIVING MECHANIsMg" Joseph veik,1vmwakee,wis`. f i Appu'atinsune 26,1939, serial- `No. 281,192 f f 10mm. (o1. '14e-2421er? This invention appertains to 4driving mechanism for power vmachinery, such "as lathes, shapers, and the like. j f

In machine shops, it has been'customary vto drivethe lathes and other machines by,` belts driven from an overhead line shaft. Muchdifficulty has been experienced with this Vtype Vof drive, and the belts cause manyaccidents. Of late years, each lathe, Shaper, or the like has been` driven `by an electric motor built directly in vthe machine. However, .as lathes and like machinery are extremely `"expensive, mostl persons cannot afford to junk good running machines in order to modernize the` shop. y

Itis, therefore, one of the primary objects of my invention to provide a novel attachment which can be readily connectedA with existing lathes, Shapers, or thelike, and effectively drive such machine Without the employance of the overhead line shaft and belts.

Another salient object of my invention is the provision of a supporting post adapted to be rigidly clamped to the frame of the lathe or like machine, having adjustably mounted thereon a,

platform for supporting an electric drive motor and drive pulley wheels of different diameters operating the ordinary pulley wheels on the lathe or like machine.

A further important object of my invention is the provision of a novel clutch associated with the adjustable platform for operatively connecting the pulley wheels to the shaft driven by the electric motor, whereby the lathe or other machinery can be conveniently and accurately controlled by the operator.

With these and other objects in view, the invention consists in the novel construction, arrangement, and formation of parts, as will be hereinafter more specifically described, claimed,

and illustrated in the accompanying drawing, in

which drawing:

Figure l is a vertical, transverse, sectional view through a lathe, showing my improved attachment incorporated therewith.

Figure 2 is a fragmentary, side, elevational view of a lathe, showing my attachment operatively connected thereto.

Figure 3 is a sectional view through the drive shaft operated from the electric motor, showing the`nove1 clutch utilized for connecting the pulleys with the drive shaft.

Figure 4 is a fragmentary, detail, sectional view, illustrating the clutch for connecting the different sized pulleys with the drive shaft.

Figure 5 is a detail sectional view taken on the 65 line 5`5 of Figure 4, looking in the direction of thearrows. .1'

`Referring to the drawing in detail, wherein similar reference vcl'iaracters designate corre- A sponding parts through the several views, the letter L generally indicates a lathe, and A my novel driving attachment for the lathe.

The lathe L can be considered as being of the customary typenow employed in machine shops and. drivenby a belt from an overhead line shaft.

While Lhave'showniny attachment A incorporatedwith a lathe, ,itisjtofbe understood that the lathe hasbeenshown to illustrate only one use of my invention, andjhenca the attachment can be associated with` other machinery, such as shapersdrill presses, etc,

As shown, the lathe L includes the usual frame or bed II)` supported uponlegs or standards II. One end ofthe frame 'or bed I0 rotatably supports the shaft I2 ,for thej centering point I3. The shaft I2 has keyed or otherwise secured thereto a series of different sized pulleys I4. The lathe includes other standard features, and as the invention resides in the attachment A, and not in the lathe, no further description of the lathe will be given.

My attachment A comprises a platform I5, including a centrally disposed sleeve IB. This sleeve is slidably mounted on a vertical post I1. In accordance with my invention, the post I'I is rigidly secured to the lathe or other machine with which it is associated, and the post extends, preferably, to the ground or floor of the shop. Rigidly bolted to the bed or frame I0 of the lathe L is a clamp I8, and this clamp I8 firmly holds the post I1 in place.

Firmly connected to the platform I6 on one side of the post I'I is an electric motor I9 of the desired rating. If preferred, the motor can be adjustably mounted on the platform so that the same can be moved back and forth. This can be easily accomplished by forming slots in the platform through which the bolts 20 for the motor extend. On the other side of the post I'I from the motor I9 is mounted bearings 2l in which is rotatably mounted a drive shaft 22. This drive shaft 22 has keyed or otherwise secured thereto a relatively large pulley Wheel 23. This pulley wheel 23 is connected by means of a belt 24 with a pulley wheel 25, which is keyed or otherwise secured to the armatureshaft 2B of the motor I9.

Rotatably mounted upon the shaft 22 is a series of different sized connected pulleys 21, and these pulleys are positioned, preferably, directly above the series of different sized pulleys l2, which are secured to the shaft l2 of the lathe. The set of pulleys 21 is adapted to be connected to the set of pulleys i4 by a shiftable pulley belt 2B.

The .set of pulleys 21 can be connected, at the will of the operator, with the drive shaft 22 by means of my novel clutch 29, which will now be described.

The clutch 29 includes an elongated hub 30 keyed or otherwise secured to the shaft 22, and, if preferred, the set of pulleys 21 can be rotatably mounted upon this hub. One end of the hub has formed thereon radially extending arms 3|, and these arms, in turn, rotatably support stub shafts 32. Rigidly secured to the stub shafts 32 are spreading cams 33, which will be hereinafter more fully described. 'I'he ends of the stub shafts 32, which are remote from the cams 33, have secured thereto crank-arms 34, and these crankarms 34 have their inner ends provided withpins or the like 35, which ride on a Shiftable cone 31. The cone 31 can be feathered on the shaft 22, if so desired', and is shifted hack and forth for rotating the shafts 32 by means of a yoke 38, which extends angularly from the inner end of the operating lever 39. The lever 39 is rookably mounted at its angle on a pivot pin liu, which is connected to the platform l5 of the attachment A.

The cams 33 are disposed between adjacent faces il of clutch shoes 42. These clutch shoes are of a semicircular shape and are formed on the common hub 30 and are arranged within one of the pulley wheels of the set of pulley wheels 21.

When the shafts 32 are actuated, the cams 33 tend to spread the clutchshoes 42 against the inherent resiliency of the arms 43, which connect said shoes to said common hub 30. Obviously, by swinging the lever 39 back and forth, the clutch 29 will be operated for connecting the set of pulleys 21 with the shaft 22.

2,258,270 Y The platform I5 can be raised or lowered on the post l1 in any preferred way, and, as illustrated, .a collar '53 is rigidly secured on the post, and this collar has rotatably mounted thereon a feed screw 45, which can be turned by a hand wheel 36. The screw d5 extends through a feed nut 41 carried by the platform, and, hence, upon the turning of the feed screw, the platform can be adjusted.

From the foregoing description it can be seen that I have provided an exceptionally simple and novel means for operatively connecting an electric motor drive unit with a lathe or similar machine for permitting the effective operation of thev machine from said motor.

Changes in details may be made without departing from the spirit or the scope of my invention, but what Iv claim as new is:

The combination with a machine including a frame andan operating shaft, of a power-drive attachment for actuating the machine and shaft, including a single upright supporting post, means rigidly securing the post to the frame of the machine in a Vertical position, a platform having a guide sleeve formed thereon intermediate its ends slidably mounted on the post with the platform partially extending over the machine, means for raising and lowering the platform and for holding the platform in a selected `adjusted position including a feed screw rotatably supported on the post, means for turning the screw, and a feed nut carried by the platform receiving the feed screw, an electric motor mounted upon the platform on one side of the post, a drive shaft rotatably mounted on the platform on the other side of the post, means operatively connecting the drive shaft to the motor, and means operatively connecting the drive shaft of the attachment with the operating shaft of the. machine.

JOSEPH VELK` 

